I didn't see my Dad much as a child. He was one of those men that have difficulty dealing with small children. When I got older and he realized he could have a meaningful conversation with me, we grew closer; that made my Mom jealous I think-- she tried to drive a wedge between us.
Dad didn't spend much time at home- partially because home ended up being a stressful place due to my Mom's mental illness. We are pretty certain she was bi-polar, but refused to go to a doctor about it because SHE wasn't crazy (it was obviously the rest of the world that was out of step) so she was never diagnosed and never treated.
Dad was an amazing man. He ran away from home at 15 and made his way to Austin, where he worked his way through college (went for a degree in music playing the clarinet) and was awarded a Fulbright Scholarship to the Sorbonne in Paris, which is where he met my Mom. After they married, he brought her back to Texas where he taught French at the University while taking classes at night in engineering. It wasn't until he died that I discovered (from my DH) that my Dad had been one of the early pioneers in Robotics and Artificial Intelligence (and he was a REAL Rocket Scientist, lol). After he retired, he continued to use his remarkable mind-- got interested in ancient Egypt and learned to read their hieroglyphics fluently, then got interested in astronomy and made his own telescope by grinding the lenses out of old glass jars. When death finally took him, he was learning to play the piano, and step dancing.
I miss my Dad. We didn't have a really close relationship in the sense of spending lots of time together. Neither of us did a lot of "reaching out", which I regret somewhat, but I realize it's just the kind of person he was-- and I am too. I am working to change that in myself, but it's not easy. I love my children fiercely, and I think they know that, but they understand that they never were and never will be the center of my universe.